Late Cretaceous to early Eocene magmatic evolution of the Laramide arc in the Nacozari quadrangle, northeastern Sonora, Mexico and its regional implications

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• 作者：Carlos M. Gonzá ; lez-Leó ; n^a ; ^{cmgleon@unam.mx} ; Luigi Solari^b ; ^{solari@unam.mx} ; Martí ; n Valencia-Moreno^a ; ^{martin.valencia@unam.mx} ; Mario A. Rascon Heimpel^c ; ^{marioarturo.rascon@mm.gmexico.com} ; Jesú ; s Solé ; ^d ; ^{jsole@geologia.unam.mx} ; Elizard Gonzá ; lez Becuar^e ; ^{elizard.gonzalez@mm.gmexico.com} ; Rufino Lozano Santacruz^d ; ^{rufino@unam.mx} ; Ofelia Pé ; rez Arvizu^b ; ^{operez@geociencias.unam.mx}
• 关键词：Laramide magmatic arc ; Nacozari quadrangle ; U-Pb geochronology ; Geochemistry ; Nd-Sr-Pb isotopes ; NW Mexico
• 刊名：Ore Geology Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：81
• 期：part_P3
• 页码：1137-1157
• 全文大小：7285 K
• 卷排序：81

文摘

Stratigraphy, geochronology and geochemistry of the Laramide magmatic arc in Sonora, Mexico. Age of the volcanism in the Nacozari quadrangle is constrained from 76.78 ± 0.42 to 57.15 ± 0.35 Ma. Granitic plutons and rhyolitic domes that intrude the volcanic rocks yield ages from 59.26 ± 0.79 to 53.30 ± 1.60 Ma. Nd, Sr and Pb isotope compositions of the Laramide rocks of the study area allow to compare them with the Mazatzal province. Isotope composition of the Laramide rocks help to constrain the tectonic boundary between the Mazatzal and Caborca blocks.